Earthquakes are common, and thousands of them happen each day. But most are too weak to feel. During a
earthquake, there is often a great noise first. Then the earth
terribly and many houses
down. Railway tracks break and trains go off lines. A great many factories are destroyed. Thousands of deaths are caused, and many more lose homes. Besides the great damage and deaths caused by the earthquake
,other accidents such as fires often
. More buildings are destroyed and more deaths caused. It is well-known of th
e of an earthquake, and for centuries man has been making researches on earthquakes. More than 2,000 years ago,
,a Chinese scientist named Zhang Heng invented a machine which could
from which direction the seismic waves（地动波）had come, and this machine is still
by scientists today. Now we know much more about earthquakes and
they happen, but we still can't tell exactly when and where earthquake will happen, and cannot stop it from happening.
| 小题2: | | A．moves | B．shakes | C．jumps | D．breaks |
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| 小题4: | | A．lonely | B．later | C．themselves | D．itself |
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| 小题5: | | A．follow | B．copy | C．come | D．enter |
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| 小题6: | | A．information | B．questions | C．dangers | D．troubles |
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| 小题7: | | A．as a result | B．in fact | C．for example | D．as well |
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| 小题8: | | A．find out | B．think up | C．point at | D．look for |
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| 小题9: | | A．improved | B．repaired | C．protected | D．used |
|